CVE-2023-42822

2023-09-2700:00:00

ubuntu.com

xrdp

vulnerability

font glyphs

out-of-bounds read

out-of-bounds write

privileged process

forking mode

upgrade

CVSS3

6.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS

0.001

Percentile

38.6%

JSON

xrdp is an open source remote desktop protocol server. Access to the font
glyphs in xrdp_painter.c is not bounds-checked . Since some of this data is
controllable by the user, this can result in an out-of-bounds read within
the xrdp executable. The vulnerability allows an out-of-bounds read within
a potentially privileged process. On non-Debian platforms, xrdp tends to
run as root. Potentially an out-of-bounds write can follow the
out-of-bounds read. There is no denial-of-service impact, providing xrdp is
running in forking mode. This issue has been addressed in release 0.9.23.1.
Users are advised to upgrade. There are no known workarounds for this
vulnerability.

OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchxrdp< 0.9.5-2ubuntu0.1~esm2UNKNOWN
ubuntu20.04noarchxrdp< 0.9.12-1ubuntu0.1+esm1UNKNOWN
ubuntu22.04noarchxrdp< 0.9.17-2ubuntu2+esm1UNKNOWN
ubuntu24.04noarchxrdp< anyUNKNOWN
ubuntu14.04noarchxrdp< 0.6.0-1ubuntu0.1+esm3UNKNOWN
ubuntu16.04noarchxrdp< 0.6.1-2ubuntu0.3+esm3UNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	18.04	noarch	xrdp	< 0.9.5-2ubuntu0.1~esm2	UNKNOWN
ubuntu	20.04	noarch	xrdp	< 0.9.12-1ubuntu0.1+esm1	UNKNOWN
ubuntu	22.04	noarch	xrdp	< 0.9.17-2ubuntu2+esm1	UNKNOWN
ubuntu	24.04	noarch	xrdp	< any	UNKNOWN
ubuntu	14.04	noarch	xrdp	< 0.6.0-1ubuntu0.1+esm3	UNKNOWN
ubuntu	16.04	noarch	xrdp	< 0.6.1-2ubuntu0.3+esm3	UNKNOWN